Title says it all. Since they're the same price, I'm slightly worried about the 8ms response on the U2311H for games, but you do gain another inch. Also, there have been reports of tinting. The 2209WA is slightly smaller, 16:10, does 75Hz, but only has a DVI and VGA connection and is EOL.

75hz makes a huge difference in many ways. Among others reasons, it's very important for a gamer. Higher is preferable, but the only way to go higher right now would result in getting a TN panel or getting a CRT.

The 2209WA is really the only monitor I'd even consider using right now. It's just that good.